Suspicious Browser History Dumping via NirSoft Tool via process_creation

ATT&CK techniques

Discovery → Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
- T1217Browser Information Discovery
Lateral Movement
Collection
- T1005Data from Local System
C2
Exfiltration
Impact

What it detects

This rule detects execution of the NirSoft BrowsingHistoryView utility, which the REMCOS RAT abuses through its DumpBrowserHistoryUsingNirsoft command to collect victim browsing data. Attackers stage this signed third-party tool to harvest history for reconnaissance and credential context. Its appearance outside sanctioned administrative use is suspicious.

Reporting behind it

Related detections9 linkedT1005 — drag to rearrange

Suspicious BoryptGrab Infostealer Staging Directory (via file_event)

Suspicious Astaroth Spambot Browser Profile Staging Directory (via file_event)

Suspicious Browser and Wallet Credential Theft via JavaScript Stealer

Suspicious WhatsAppBackup Data Staging Archive Creation

Suspicious Environment File Credential Search via findstr (via process_creation)

Suspicious RDP Bitmap Cache Temp Files Written by mstsc in Rogue RDP Campaign (via file_event)

Suspicious Azure CLI Disk Snapshot and Copy for Data Theft

Windows Script Interpreter Launching trufflehog or gitleaks Credential Scanner

Linux Script Interpreters Spawning Credential Scanners (trufflehog, gitleaks)

Suspicious Browser History Dumping via NirSoft Tool via process_creation

Pivot detection · T1005 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →